forked from osmocom/wireshark
![Michael Mann](/assets/img/avatar_default.png)
Part 2 of a few Change-Id: Ic1f1aafe2ed02dce95b15c03a91cbd68807a5cf4 Reviewed-on: https://code.wireshark.org/review/8165 Petri-Dish: Alexis La Goutte <alexis.lagoutte@gmail.com> Reviewed-by: Michael Mann <mmann78@netscape.net>
346 lines
6 KiB
C
346 lines
6 KiB
C
/* packet-mpeg1.c
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*
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* Routines for RFC 2250 MPEG-1 dissection
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*
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* Copyright 2001,
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* Francisco Javier Cabello Torres, <fjcabello@vtools.es>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/*
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* This dissector tries to dissect the MPEG-1 video streams.
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/rtp_pt.h>
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void proto_register_mpeg1(void);
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void proto_reg_handoff_mpeg1(void);
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/* MPEG1 header fields */
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static int proto_mpg = -1;
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static int hf_rtp_mpg_mbz = -1;
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static int hf_rtp_mpg_T = -1;
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static int hf_rtp_mpg_tr = -1;
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static int hf_rtp_mpg_an = -1;
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static int hf_rtp_mpg_n = -1;
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static int hf_rtp_mpg_s = -1;
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static int hf_rtp_mpg_b = -1;
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static int hf_rtp_mpg_e = -1;
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static int hf_rtp_mpg_p = -1;
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static int hf_rtp_mpg_fbv = -1;
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static int hf_rtp_mpg_bfc = -1;
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static int hf_rtp_mpg_ffv = -1;
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static int hf_rtp_mpg_ffc = -1;
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static int hf_rtp_mpg_data = -1;
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/* MPEG-1 fields defining a sub tree */
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static gint ett_mpg = -1;
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static const value_string rtp_mpg_picture_types_vals[] =
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{
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{ 0, "Forbidden" },
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{ 1, "I-Picture" },
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{ 2, "P-Picture" },
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{ 3, "B-Picture" },
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{ 4, "D-Picture" },
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{ 5, "reserved" },
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{ 6, "reserved" },
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{ 7, "reserved" },
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{ 0, NULL },
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};
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static void
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dissect_mpeg1( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree )
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{
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proto_item *ti;
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proto_tree *mpg_tree;
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unsigned int offset = 0;
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static const int * mpg_fields1[] = {
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&hf_rtp_mpg_mbz,
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&hf_rtp_mpg_T,
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&hf_rtp_mpg_tr,
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NULL
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};
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static const int * mpg_fields2[] = {
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&hf_rtp_mpg_an,
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&hf_rtp_mpg_n,
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&hf_rtp_mpg_s,
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&hf_rtp_mpg_b,
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&hf_rtp_mpg_e,
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&hf_rtp_mpg_p,
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NULL
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};
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static const int * mpg_fields3[] = {
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&hf_rtp_mpg_fbv,
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&hf_rtp_mpg_bfc,
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&hf_rtp_mpg_ffv,
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&hf_rtp_mpg_ffc,
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NULL
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};
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "MPEG-1");
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col_set_str(pinfo->cinfo, COL_INFO, "MPEG-1 message");
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/* Get MPEG-1 fields */
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ti = proto_tree_add_item( tree, proto_mpg, tvb, offset, -1, ENC_NA );
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mpg_tree = proto_item_add_subtree( ti, ett_mpg );
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proto_tree_add_bitmask_list(mpg_tree, tvb, offset, 2, mpg_fields1, ENC_BIG_ENDIAN);
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offset += 2;
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proto_tree_add_bitmask_list(mpg_tree, tvb, offset, 2, mpg_fields2, ENC_BIG_ENDIAN);
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offset += 1;
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proto_tree_add_bitmask_list(mpg_tree, tvb, offset, 1, mpg_fields3, ENC_NA);
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offset += 1;
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/* The rest of the packet is the MPEG-1 stream */
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proto_tree_add_item( mpg_tree, hf_rtp_mpg_data, tvb, offset, -1, ENC_NA );
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}
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void
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proto_register_mpeg1(void)
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{
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static hf_register_info hf[] =
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{
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{
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&hf_rtp_mpg_mbz,
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{
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"MBZ",
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"rtp.payload_mpeg_mbz",
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FT_UINT16,
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BASE_DEC,
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NULL,
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0xF800,
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NULL, HFILL
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}
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},
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{
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&hf_rtp_mpg_T,
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{
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"T",
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"rtp.payload_mpeg_T",
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FT_UINT16,
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BASE_DEC,
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NULL,
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0x0400,
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NULL, HFILL
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}
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},
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{
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&hf_rtp_mpg_tr,
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{
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"Temporal Reference",
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"rtp.payload_mpeg_tr",
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FT_UINT16,
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BASE_DEC,
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NULL,
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0x03FF,
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NULL, HFILL
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}
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},
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{
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&hf_rtp_mpg_an,
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{
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"AN",
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"rtp.payload_mpeg_an",
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FT_UINT16,
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BASE_DEC,
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NULL,
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0x80,
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NULL, HFILL
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}
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},
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{
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&hf_rtp_mpg_n,
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{
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"New Picture Header",
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"rtp.payload_mpeg_n",
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FT_UINT16,
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BASE_DEC,
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NULL,
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0x40,
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NULL, HFILL
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}
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},
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{
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&hf_rtp_mpg_s,
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{
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"Sequence Header",
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"rtp.payload_mpeg_s",
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FT_BOOLEAN,
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16,
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NULL,
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0x20,
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NULL, HFILL
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}
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},
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{
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&hf_rtp_mpg_b,
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{
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"Beginning-of-slice",
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"rtp.payload_mpeg_b",
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FT_BOOLEAN,
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16,
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NULL,
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0x10,
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NULL, HFILL
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}
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},
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{
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&hf_rtp_mpg_e,
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{
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"End-of-slice",
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"rtp.payload_mpeg_e",
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FT_BOOLEAN,
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16,
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NULL,
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0x08,
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NULL, HFILL
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}
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},
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{
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&hf_rtp_mpg_p,
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{
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"Picture type",
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"rtp.payload_mpeg_p",
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FT_UINT16,
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BASE_DEC,
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VALS(rtp_mpg_picture_types_vals),
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0x07,
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NULL, HFILL
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}
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},
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{
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&hf_rtp_mpg_fbv,
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{
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"FBV",
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"rtp.payload_mpeg_fbv",
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FT_UINT16,
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BASE_DEC,
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NULL,
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0x80,
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NULL, HFILL
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}
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},
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{
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&hf_rtp_mpg_bfc,
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{
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"BFC",
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"rtp.payload_mpeg_bfc",
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FT_UINT16,
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BASE_DEC,
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NULL,
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0x70,
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NULL, HFILL
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}
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},
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{
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&hf_rtp_mpg_ffv,
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{
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"FFV",
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"rtp.payload_mpeg_ffv",
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FT_UINT16,
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BASE_DEC,
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NULL,
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0x08,
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NULL, HFILL
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}
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},
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{
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&hf_rtp_mpg_ffc,
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{
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"FFC",
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"rtp.payload_mpeg_ffc",
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FT_UINT16,
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BASE_DEC,
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NULL,
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0x07,
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NULL, HFILL
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}
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},
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{
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&hf_rtp_mpg_data,
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{
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"MPEG-1 stream",
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"mpeg1.stream",
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FT_BYTES,
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BASE_NONE,
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NULL,
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0x0,
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NULL, HFILL
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}
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},
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};
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static gint *ett[] =
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{
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&ett_mpg,
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};
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proto_mpg = proto_register_protocol("RFC 2250 MPEG1","MPEG1","mpeg1");
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proto_register_field_array(proto_mpg, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void
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proto_reg_handoff_mpeg1(void)
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{
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dissector_handle_t mpeg1_handle;
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mpeg1_handle = create_dissector_handle(dissect_mpeg1, proto_mpg);
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dissector_add_uint("rtp.pt", PT_MPV, mpeg1_handle);
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}
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 8
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* tab-width: 8
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* indent-tabs-mode: t
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* End:
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*
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* vi: set shiftwidth=8 tabstop=8 noexpandtab:
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* :indentSize=8:tabSize=8:noTabs=false:
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*/
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